Apparatus for the treatment of fluids with coagulants.



A. P. STROHMENGER.

APPARATUS FOR THE TREATMENT OF FLUIDS WITH COAGULANTS.

APPLICATION FILED SEPT. 30. 19M.

ARTHUR. PERCY s'rnonmnnena, or wnsri-erns'rnn, LONDON, nneLnnnnssrenon T0 ESTER & C0,, LIMITED, OF LONDON, ENGLAND.

APPARATUS FOR THETREATMENT OF FLUIDS W'ITI-I COAGULANTS.

Specification of Letters Patent.

Application filed September 30, 1914. 7 Serial No. 864,293.

To all whom it may concern:

Be it known that I, ARTHUR PERCY Srnon- MENGER, a subject of the King of Great Britain, and residentaof Caxton House, in the city of Westminster, county of London, England, have invented certain new and useful Improved Apparatus for the Treatment of Fluids with (Joagulants, of which the following is a specification.

This invention relates to apparatus for the treatment with coagulants of water which may contain matter in solution, for the purpose of accelerating the deposition of foreign matters from such impure water, and also for assisting in the filtration thereof by filming the tilteringsubstance. The

apparatus is primarily applicable to the pu- 1 rification of impure water, but it may also be applied to the treatment of other fluids containing a large proportion of water with foreign matters in suspension.

It is the object of the invention to provide an improved apparatus wherein a coagulantis produced in the fluid by the passage of a current therethrough, while an anode is employed consisting ofa metal which yields a coagulant on the passage of the current;

It is essentialthat the stream of fluid-to be treated should be forced under pressure through the place where the electrolytic action takes place, in order that the stream of fluid may be sufliciently strong to carry away the coagulant as it is formed. Other wise the coagulant would be deposited onthe surface of the anode forming a layer which i would act as a dielectric oflering a high electrical resistance to the passage of the current. V a

The accompanying drawing shows in section the apparatus according to the invention.. I

In this drawing, a is a pipe or casing, one

side of which is closed by a plate 6 carrying with suitable insulation a rod 0 forming the anode. For instance the rod 0 may be supportedv by insulated bolts 7, to one of which a lead cl is secured, connected to the positive terminal of a source of current. 4 e 1 e a 1 r 0 1 c a an Th p s f conducting nateri l d is connected by a lead e to the negative terminal of the source of current. consists of a metal whlch Wlll form a coagulant when the current passes, while the fluid to be treated is forced under pressure The rod 0 through the pipe a around the rod 0. If the rod 0 is formed of aluminium and the fluid consists of or contalns water, livdroxid of aluminium will be formed, and this acts as an effective coagulant. The stream of the fluid under pressure removes the coagulant as it forms upon the anode c, the current being thus enabled to flow' continuously and the quantity of hydroxid passing into the fluid will be proportional to the rate of flow and to the strength of the current. The

strength of the current, apart from the re-' sistance of the dielectric, will vary as the conductivity of the fluid, which varies with the total solid. content in solution, so that the quantitv of coagulant introduced will depend upon the quantity of the fluid and upon the said solid content, which is just the condition required. It is necessary that a minimum head of 5 lb. per sq. inch above atmosphere be employed in order to effect the removal of the hydroXid. The diameter of the rod 0 is preferably only slightly smaller than the internal diameter of the I Patented Nov. 23,1915.

pipe so as to leave only a small annularspace for the fluid to pass through, in order that as large a proportion of the fluid as treated, and the rodl'c consisted of alu-v minium, the waterwas introduced under a pressure or head of 8 pounds per square inch, and approximately 100 gallons of water per hour were treated. With-water containing 20 parts ofsolid matter per 100,000

of water, a difl'erence of potential of 3 volts between the terminals (2 and e liberated .072 grams of aluminium hydroxid per 100 gallons of water. Thisis sufiicient to attain the desired result with ordinary waters. The strength of current, the dimensions of the apparatus, and the pressure head may however'be varied according to circumstances,

Having thus described my invention,

what I claim as new and desire to secure by Letters Patent is possible may come into actual contact with Appz iratusfoifluse in adding apoagulant to ingqeleotrio current into said anode and 10 a fluidConsistingprinefip'ally of Water, the awaydfr'omsaid cathode. said apparatus comprising an anode'in'the' Inwitness whereof I have hereunto signed form ofmrod ofaluminiumpa .eathode;in myjname this 10th ,dayflof beptemberin the i theform of whollow member.- surrounding. presencesiof two subscribing Witnesses.

said rod so as to leave a narrow circumfer- ARTHUR PERCY STROHMENGER. entlal space between-the same, means for Witnesses:

supporting the rod with insulation Within H. W. BLAKE, said hollow Inember'and means fon-introduc- E. ROGERS.

Copies of this patent may be obtalined'for five cents each, by addressing the Commissioner of Patents.

- Washington, D. C. 

